1. Brake Systems & Basic Hydraulics
A History of Braking
How do you stop a Stage Coach?
No Matter the how you stop it!
Friction – the resistance between two moving parts!
Is the Key!

2. Basic Hydraulics “Pascal's Law”
Pressure exerted upon a mass of liquid in a closed container, transmits that pressure in all directions!
3000 lbs
3000 lbs
3000 lbs
100 lbs
500 lbs
3000 lbs
100 lbs
500 lbs
500 lbs
3000 lbs
3000 lbs

3. Basic Hydraulics “Pascal's Law” ½” 2” ½” 1” ½” 1” 1”
Transmits Motion Also! ½” 2” ½” 1” ½” 1” 1”
Volume down must equal volume up !
Down Diameter 1” Up Diameters ½”
1” Diameter Each
Down Diameter 1” Up Diameter 2”

4. Pascal Law & Automotive Braking

5. Hydraulic Brake Components
Single Cylinder
Master Cylinder
Dual Cylinder
Master Cylinder
Master Cylinder
Pedal Pressure

6. Hydraulic Brake Components
Proportioning Valve
Wheel Cylinder

7. Hydraulic Brake Components
Brake Caliper

8. Bleeding the Hydraulics
With a Pressure Bleeder
Manual Bleeding
“DOWN”
“UP”
“Open”
“Close”
No More Air Pockets
“Repeat at other wheels”
Remember to
Check fluid in Master Cylinder

9. Drum Brakes Anchor Pin Secondary Shoe Wheel Cylinder Brake Drum
Brake Shoes
Return Springs
Brake Shoe Retainer
Primary Shoe

10. Drum Brakes
Manual Adjusting
Self Adjusting
Parking Brake

11. Pressure exerted over a larger surface area per PSI means
Disk Brakes
Disk Brake Pads
Basic Operation
Caliper Types
Pressure exerted over a larger surface area per PSI means
“BETTER BRAKING”

12. Disk Brakes Disk Brake Advantages Disk Brake Disadvantages
- better braking
- cost more, initial & replacement
less parts
- wet splash
- easy replacement
- parking brake problems
- easy wear inspection
- better cooling
- no adjustment required

13. Power Brakes

14. ABS Brakes
Anti Lock Brake System

15. Brake Demo’s Replacing Brake Pads Wheel Cylinder Honing
Replacing Brake Shoes
Replacing Brake Pads
Wheel Cylinder Honing
Machining a Drum
Machining a Rotor